We recommend you book your ski hire in advance via the internet. it'll save you time when you arrive and often you can secure a discounted rate.
Here are links to 2 ski hire shops within 50m of the apartment.
Intersport (note they have 2 shops in the village "La Musardiere"is the closest)
http://www.intersport-chatel.com/en/
Germain Sports
http://www.germainsports.sport2000.fr/
This firm will deliver your equipment
http://www.skihire2u.com/prices/
This link will give you a list of all the ski hire shops in the village:-
http://info.chatel.com/rent-or-buy-your-ski-equipment.html